/ ˌləʊkəˈməʊtɪv; NAmE ˌloʊkəˈmoʊ-/ (also informal loco ) noun , adjective
■ noun
a railway engine that pulls a train :
steam / diesel / electric locomotives
■ adjective
( formal ) connected with movement
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WORD ORIGIN
early 17th cent. (as an adjective): from modern Latin locomotivus , from Latin loco (ablative of locus place) + late Latin motivus motive, suggested by medieval Latin in loco moveri move by change of position.